Horse-riding bicycle

ABSTRACT

Provided is a horse-riding bicycle in which a horse-riding effect is obtained by performing both normal driving and horse-riding driving (swinging driving), a user is allowed to simply switch a driving mode between a normal driving mode and a horse-riding driving mode, and a horse-riding driving structure is improved to have a simple structure so that a reduction in costs is achieved and, further, a switching operation between the normal driving mode and the horse-riding driving mode is smoothly performed.

CROSS-REFERENCE(S) TO RELATED APPLICATION

This application claims priority of Korean Patent Application No.10-2015-0037617, filed on Mar. 18, 2015, in the Korean IntellectualProperty Office, which is hereby incorporated by reference in itsentirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a horse-riding bicycle in which ahorse-riding effect can be obtained by performing both normal drivingand horse-riding driving (swinging driving), a user can simply switch adriving mode between a normal driving mode and a horse-riding drivingmode, and a horse-riding driving structure is improved to have a simplestructure so that a reduction in costs can be achieved and, further, aswitching operation between the normal driving mode and the horse-ridingdriving mode is smoothly performed.

2. Description of the Related Art

Generally, horse-riding bicycles having various structures have beenapplied. Korean Patent Application No. 10-2010-0071166, as an example ofthe applications, discloses a driving-mode-switching-type horse-ridingbicycle having a configuration in which a driving-mode-switching guidemember as one of devices for switching driving modes is operated furthersmoothly.

However, the driving-mode-switching-type horse-riding bicycle disclosedin Korean Patent Application No. 10-2010-0071166 has a problem in thatthe structures of a driving-mode-switching main body, adriving-mode-switching guide member, and a pulling device are extremelycomplicated, resulting in an increase in costs. In addition, there is aproblem in that due to the extremely complicated structures, a switchingoperation between the normal driving mode and the horse-riding drivingmode is not performed smoothly.

PRIOR ART DOCUMENT(S) Patent Document

(Patent Document 0001) Patent Document: Patent Application No.10-2010-0071166 (Jul. 23, 2010)

SUMMARY OF THE INVENTION

An object of the present invention is to provide a horse-riding bicyclein which both normal driving and horse-riding driving can be performed,and thus, a horse-riding effect can be obtained.

Another object of the present invention is to provide a horse-ridingbicycle in which normal driving mode and horse-riding driving mode canbe simply switched, and thus, convenience of a user and marketability ofa product can be improved.

Another object of the present invention is to provide a horse-ridingbicycle in which a horse-riding driving structure is improved to have asimple structure so that a reduction in costs can be achieved and,further, a switching operation between a normal driving mode and ahorse-riding driving mode can be performed smoothly.

In order to achieve these objects described above, there is provided ahorse-riding bicycle in which guide holes and roller holes arerespectively formed in a pair of hubs which are installed in each offront and rear wheels of a bicycle, connection plates which areconnected to both sides of the roller hole and in which shaft holes areformed are connected, a pair of support plates of which one sides areconnected by a connection plate so as to support a hub shaft connectedto a fork are movably assembled inside the guide hole of the hub, guideplates which guide movement of the hub are respectively attached toinner upper and lower portions of the hub. a screw rod which is disposedin center portions of the shaft holes is fixed to the connection plateof the support plate, a movement roller is installed in the shaft holessuch that both ends are rotatable in a state where the movement rolleris thread-joined to the screw rod and an outer surface protrudes outsidethrough the roller hole and moves the hub to a position of a normaldriving mode or a horse-riding driving mode by rotating in a normaldirection or a reverse direction, left and right fixing rings whichinclude pads of which inner surfaces are come into contact with themovement roller are disposed in an outer side of the hub, left and rightoperation members which cause the left and right fixing rings to comeinto close contact with the movement roller selectively are installed inthe fork, and a pair of switching members which respectively pull orrelease the left and right operation members through wires are installedin handles on both sides of the bicycle.

According to embodiments of the present invention, both normal drivingand horse-riding driving can be performed by moving the hub to aposition concentric or eccentric with respect to the hub shaft. As aresult, a swinging movement similar to horse riding is achieved incycling, and thus it is possible to provide a further exciting feelingand a total-body workout in simple cycling. In addition, a user cansimply switch a driving mode between the normal driving mode and thehorse-riding driving mode, and thus convenience of a user andmarketability of a product can be improved. Furthermore, the structureof the horse-riding driving mode in which the hub is simple, and thus areduction in costs can be achieved and, further, a switching operationbetween the normal driving mode and the horse-riding driving mode can beperformed smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 to 12 illustrate a first embodiment of the present invention.

FIG. 1 is a side view illustrating a whole structure of the firstembodiment of the present invention.

FIG. 2 is a perspective view illustrating an assembled state of a huband a support plate according to the first embodiment of the presentinvention.

FIGS. 3 and 4 are exploded perspective views illustrating a principalportion of the first embodiment of the present invention.

FIG. 5 is an exploded perspective view of a movement roller according tothe first embodiment of the present invention.

FIG. 6 is a plane cross-sectional view illustrating an assembled stateof the hub and the support plate according to the first embodiment ofthe present invention.

FIG. 7 is an exploded perspective view illustrating an operation stateof left and right operation members according to the first embodiment ofthe present invention.

FIG. 8 is a cross-sectional view illustrating an assembled state ofmembers illustrated in FIG. 7.

FIGS. 9a, 9b, and 9c are plan views illustrating an operation state ofthe left and right operation members according to the first embodimentof the present invention.

FIGS. 10a and 10b are side views illustrating a normal driving mode anda horse-riding driving mode according to the first embodiment of thepresent invention.

FIG. 11 is an enlarged view of a part A of FIG. 1.

FIG. 12 is an exemplary view of a switching member according to thefirst embodiment of the present invention.

FIGS. 13 to 22 illustrate a second embodiment of the present invention.

FIG. 13 is a side view illustrating a whole structure of the secondembodiment of the present invention.

FIG. 14 is a perspective view illustrating an assembled state of a huband a support plate according to the second embodiment of the presentinvention.

FIGS. 15 and 16 are exploded perspective views illustrating a principalportion of the first embodiment of the present invention.

FIG. 17 is a lateral cross-sectional view illustrating an assembledstate of the hub and the support plate according to the secondembodiment of the present invention.

FIG. 18 is a plane cross-sectional view illustrating an assembled stateof the hub and the support plate according to the second embodiment ofthe present invention.

FIGS. 19a and 19b are side views illustrating a normal driving mode anda horse-riding driving mode according to the second embodiment of thepresent invention.

FIGS. 20a and 20b are respectively a front cross-sectional view and alateral cross-sectional view of a slip ring according to the secondembodiment of the present invention.

FIG. 21a is a perspective view of an insulation ring according to thesecond embodiment of the present invention.

FIG. 21b is a perspective view of first and second rotation rings of theslip ring according to the second embodiment of the present invention.

FIG. 22 is an exemplary view of a switching member according to thesecond embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

The basic feature of a technical configuration of a horse-riding bicycleaccording to a first embodiment of the present invention is as follows.As illustrated in FIGS. 1 to 12, the horse-riding bicycle according tothe first embodiment of the present invention includes: a pair of hubs100 which are installed in each of front and rear wheels 2 and 3 of abicycle 1, the pair of hubs 100 including guide holes 101 and rollerholes 102 and first and second connection plates 103 and 104 which areconnected to both sides of the roller hole 102 and in which shaft holes103 a and 104 a are formed; a pair of support plates 110 which aremovably assembled inside the guide hole 101 of the hub 100 and of whichone sides are connected by a connection plate 111 so as to support a hubshaft 5 connected to a fork 4; guide plates 120 which are respectivelyattached to inner upper and lower portions of the hub 100 and guidemovement of the hub 100; a screw rod 130 which is fixed to theconnection plate 111 of the support plate 110 and disposed in centerportions of the shaft holes 103 a and 104 a; a movement roller 140 whichis installed in the shaft holes 103 a and 104 a such that both ends arerotatable in a state where the movement roller 140 is thread-joined tothe screw rod 130 and an outer surface protrudes outside through theroller hole 102 and moves the hub 100 to a position of a normal drivingmod or a horse-riding driving mode by rotating in a normal direction ora reverse direction; left and right fixing rings 150 a and 150 b whichare disposed in an outer side of the hub 100 and include pads 151 a and151 b of which inner surfaces are come into contact with the movementroller 140; left and right operation members 160 a and 160 b which areinstalled in the fork 4 and cause the left and right fixing rings 150 aand 150 b to come into close contact with the movement roller 140selectively; and a pair of switching members 170 which are installed inhandles 6 on both sides of the bicycle 1 and respectively pull orrelease the left and right operation members 160 a and 160 b throughwires W3 and W4.

In this case, the hubs 100 are formed to have a rectangular shape. Thehubs 100 are installed on both sides of center portions of the frontwheel 2 and the rear wheel 3 of the bicycle 1. The guide holes 101 andthe roller holes 102 each having a rectangular shape are respectivelyformed in the pair of both hubs 100. In addition, the first connectionplate 103 and the second connection plate 104 in which the shaft holes103 a and 104 a are formed are connected to both sides of the rollerholes 102 of the pair of both hubs 100. In this case, a plurality ofspacing rods (105) are connected to both the hubs 100 and the guideplates 120 by fastening screws or the likes, as illustrated in FIG. 2.

The support plate 110 is formed to have a rectangular shape and ismovably assembled inside the guide holes 101 of both the hubs 100 whichare disposed in the front and rear wheels 2 and 3. The pair of bothsupport plates 110 rotatably support front and rear hub shafts 5 whichare connected to the front and rear forks 4. The connection plate 111 isconnected to one sides of the pair of both support plates 110.

The guide plates 120 are respectively attached to the inner upper andlower portions of the hub 100. Both the guide plates 120 in the upperand lower portions guide the movement of the hub 100.

According to the present invention, two fixing pieces 121 in which screwholes 121 a are formed are attached to each of the guide plates (120) onboth sides of the guide hole 101, as illustrated in FIGS. 3 and 4.Furthermore, in a center portion between both the fixing pieces 121, amovement tube 122 is attached to the guide plate 120. Both ends of aguide rod 123 are fixed to screw holes 121 a of both the fixing pieces121 by fastening a screw 124, in a state where the guide rod 123 isinserted into the movement tube 122. In addition, support tubes 112 intowhich the guide rods 123 are inserted and which movably support theguide rods 123 are attached to upper and lower portions on one side ofthe support plate 110.

One end of the screw rod 130 is integrally fixed to the connection plate111 of the support plate 110. The screw rod 130 is disposed to extendover center portions of the shaft holes 103 a and 104 a of the firstconnection plate 103 and the second connection plate 104.

According to the present invention, a pair of fixing pieces 113 in whichrivet holes 113 a are formed are attached to the connection plate 111,as illustrated in FIG. 4. Furthermore, a fixing portion 131 which has arivet hole 131 a is formed in one end of the screw rod 130. The fixingportion 131 is interposed between the pair of fixing pieces 113 andfixed by a rivet V. A hollow portion 132 is formed in an inner portionof the screw rod 130 to reduce the weight.

The movement roller 140 is installed in the shaft holes 103 a and 104 asuch that both ends of the movement roller 140 are rotatable in a statewhere the movement roller 140 is thread-joined to the screw rod 130 andprotrudes outside through the roller hole 102. The movement roller 140moves the hub 100 to a position of a normal driving mode or ahorse-riding driving mode by rotating in a normal direction or a reversedirection.

According to the present invention, a female screw 141 to which thescrew rod 130 is thread-joined is formed in a center portion in an innerportion of the movement roller 140, as illustrated in FIGS. 5 and 6. Inaddition, insertion holes 142 are respectively formed on both sides ofthe movement roller 140. Rotation portions 143 in which screw holes 143a pass through center portions of inner portions are respectivelyinserted into the insertion holes 142 and fixed by fastening a pluralityof bolts 144 and nuts 145. In the rotation portions 143, shafts 143 bwhich are respectively inserted into the shaft holes 103 a and 104 a areformed.

The movement roller 140 is rotatably installed in the first and secondconnection plates 103 and 104 of the hub 100. When a rotation force isapplied to the movement roller 140 in a normal direction or a reversedirection, the guide hole 101 of the hub 100 smoothly moves along thesupport plate 110 toward an inner side or an outer side by tightening orreleasing of the movement roller 140 which is thread-joined to the screwrod 130. As a result, the hub 100 can maintain a concentric state or aneccentric state in relation to the hub shaft 5. In this case, the screwrod 130 maintains a fixed state in relation to the support plate 110 andthe movement roller 140 is rotatably installed in the hub 100 andassembled by being screwed with the screw rod 130, and thus, when themovement roller 140 is rotated in the normal direction or the reversedirection, the movement roller 140 moves in a direction directed to thehub shaft 5 or an opposite direction by the screw rod 130. As a result,the hub 100 moves along with the movement roller 140.

The left and right fixing rings 150 a and 150 b are respectivelydisposed on outer sides of the hubs 100. The pads 151 a and 151 b whichcome into contact with the movement roller 140 are respectively attachedto inner surfaces of the left and right fixing rings 150 a and 150 b. Inthis case, the left and right fixing rings 150 a and 150 b cause themovement roller 140 to rotate in the normal direction or the reversedirection. In other words, the left fixing ring 150 a is used to movethe hub 100 in an eccentric direction during horse-riding driving andthe right fixing ring 150 b is used to move the hub 100 in a centerdirection during normal driving.

The left and right operation members 160 a and 160 b are installed inthe fork 4. The left and right operation members 160 a and 160 b causethe left and right fixing rings 150 a and 150 b to come into closecontact with the movement roller 140 selectively. In this case, the leftoperation member 160 a is used to move the hub 100 in the eccentricdirection during horse-riding driving and the right operation member 160b is used to move the hub 100 in the center direction during normaldriving.

According to the present invention, operation rods 154 a and 154 b arefixed to both upper portions and lower portions of the left and rightfixing rings 150 a and 150 b, as illustrated in FIGS. 7, 9 a, 9 b, and 9c. Furthermore, the left and right operation members 160 a and 160 b areconstituted of a pair of fixing plates 164 a and 164 b which are fixedto the fork 4 and include support tubes 163 a and 163 b to which theoperation rods 154 a and 154 b are respectively inserted. The operationrods 154 a and 154 b are inserted into the support tubes 163 a and 163 bin a state where the operation rods 154 a and 154 b receive elasticityfrom springs 156 a and 156 b supported by snap rings 155 a and 155 b.Therefore, the left and right fixing rings 150 a and 150 b elasticallycome into contact with the support tubes 163 a and 163 b. Cam fixingpieces 165 a and 165 b are attached to upper and lower portions of thefixing plates 164 a and 164 b. In addition, operation cams 166 a and 166b are rotatably respectively inserted in the cam fixing pieces 165 a and165 b. The operation cams 166 a and 166 b push the operation rods 154 aand 154 b, in such a manner that the operation cams 166 a and 166 bcause the left and right fixing rings 150 a and 150 b to come into closecontact with the movement roller 140 selectively. In addition, wires w3and w4 are respectively connected to pivoting pieces 166-1 a and 166-1 bwhich are provided in the cam fixing pieces 165 a and 165 b.

The wire W3 operates the left operation cam 166 a. An upper end of thewire W3 is connected to the switching member 170 and a lower end of thewire W3 is connected to the pivoting piece 166-1 a of the left operationcam 166 a. In this case, when the wire W3 is pulled through theswitching member 170, the left operation cam 166 a rotates and pushesthe left operation rod 154 a to the movement roller 140, in such amanner that the pad 151 a comes into close contact with the movementroller 140, as illustrated in FIG. 9b . In contrast, when the wire W3 isreleased through the switching member 170, the left operation cam 166 aand the left operation rod 154 a return the original state, and thus thepad 151 a of the left fixing ring 150 a is separate from the movementroller 140.

The wire W4 operates the right operation cam 166 b. An upper end of thewire W4 is connected to the switching member 170 and a lower end of thewire W4 is connected to the pivoting piece 166-1 b of the rightoperation cam 166 b. In this case, when the wire W4 is pulled throughthe switching member 170, the right operation cam 166 b rotates andpushes the right operation rod 154 b to the movement roller 140, in sucha manner that the pad 151 b comes into close contact with the movementroller 140, as illustrated in FIG. 9c . In contrast, when the wire W4 isreleased through the switching member 170, the right operation cam 166 band the left operation rod 154 a return the original state, and thus thepad 151 b of the right fixing ring 150 b is separate from the movementroller 140.

According to the present invention, a pair of restriction portions 7 aand 7 b which guide or restrict the movement of the wires W3 and w4 areprovided in a frame 7 of the bicycle 1, as illustrated in FIG. 11.Furthermore, engagement portions 7 c and 7 d which engage with therestriction portions 7 a and 7 b are respectively provided in the wiresW3 and w4. In this case, the engagement portions 7 c and 7 d arealternately operated in a portion between a pair of restriction portions7 a and 7 b.

In addition, according to the present invention, one ends of a pair offirst links K1 are connected to the engagement portion 7 c or 7 dthrough a shaft P1, as illustrated in FIG. 11. Furthermore, both ends ofa pair of second links K2 which are fixed to the frame through a shaftP2 in a state where center portions of the second links K2 cross to eachother are respectively connected to the other ends of the pair of firstlinks K1 through shafts P3. In this case, when both the engagementportions 7 c and 7 d move upward or downward, the pair of first links K1and the second links K2 move like a seesaw and allow the wires W3 and W4to operate smoothly.

The switching members 170 are respectively installed in handles 6 onboth sides of the bicycle 1, as illustrated in FIG. 12. A pair of bothswitching members 170 pull or release the wire W3 of the left operationmembers 160 a and the wire W4 of the right operation members 160 b whichare disposed in the front and rear wheels 2 and 3. In this case, theswitching member 170 installed in one side of the handle 6 operates boththe wires W3 and w4 disposed in the front wheel 2 and the switchingmember 170 installed in the other side of the handle 6 operates bothwires W3 and W4 disposed in the rear wheel 3.

The details of the whole operational relationship of the horse-ridingbicycle according to the first embodiment of the present inventionconfigured as described above will be explained below with reference tothe appended drawings.

First, FIGS. 9a and 10a illustrate the normal driving mode state inwhich the hub 100 and the hub shaft 5 are concentrically disposed. Inthis state, the hub 100 maintains a concentric state in relation to thehub shaft 5. Furthermore, when the bicycle 1 is driven in this state,the left and right fixing rings 150 a and 150 b does not interfere withthe movement roller 140 rotating with the hub 100. As a result, the hub100 does not swing and rotates in a state where the hub 100 maintainsthe normal driving mode in concentric with the hub shaft 5.

In the normal driving mode, the movement roller 140 is separate from thepad 151 a of the left fixing ring 150 a and the pad 151 b of the rightfixing ring 150 b, as illustrated in FIGS. 9a and 10a . As a result,during driving, the movement roller 140 is prevented from rotatingarbitrary in the normal direction or the reverse direction at anoriginal position.

Next, when a user switches a mode of the switching member 170 to thehorse-riding driving mode in the normal driving mode so as to switch thedriving mode to the horse-riding driving mode, the left operation member160 a pushes the left fixing ring 150 a to the movement roller 140through the wire W3 which is pulled as illustrated in FIG. 9b , in sucha manner that the pad 151 a comes into close contact with the movementroller 140.

When the bicycle is driven in the state illustrated in FIG. 9b , themovement roller 140 rotating with the hub 100 rotates in a state wherethe movement roller 140 is in close contact with the pad 151 a of theleft fixing ring 150 a, and thus the movement roller 140 rotates in adirection in which the movement roller 140 is released from the screwrod 130. In this case, the movement roller 140 rotates along with thepad 151 a of the left fixing ring 150 a, in a direction in which themovement roller 140 is released from the rod, and moves outward, asillustrated in FIGS. 9b and 10b . At this time, the hub 100 also movesoutward along with the support plate 110.

Therefore, the hub 100 is eccentric with respect to the hub shaft 5, asillustrated in FIGS. 9b and 10b . As a result, the horse-riding drivingmode in which the bicycle swings during driving is maintained. After thedriving mode is switched to the horse-riding driving mode, as describedabove, the wire W3 in a pulled state is released through the switchingmember 170, in such a manner that the pad 151 a of the left fixing ring150 a is separate from the movement roller 140. In this case, duringdriving, a user can appropriately adjust a movement (eccentric) distanceof the hub 100 through the switching member 170. In other words, a userpulls the wire W3 through the switching member 170 until the hub 100moves completely outward and allows the movement roller 140 to rotate.When a user releases the wire W3 through the switching member 170 beforethe hub 100 moves completely outward, the pad 151 a of the left fixingring 150 a is separate from the movement roller 140. Therefore, therotation of the movement roller 140 is stopped and the hub 100 isprevented from moving further outward. As a result, the movementdistance of the hub 100 is adjusted during the horse-riding drivingmode.

When a user switches the mode of the switching member 170 to the normaldriving mode during the horse-riding driving mode so as to switch thedriving mode to the normal driving mode, the right operation member 160b pushes the right fixing ring 150 b to the movement roller 140 throughthe wire W4 which is pilled as illustrated in FIG. 9c , in such a mannerthat the pad 151 b comes into close contact with the movement roller140.

When the bicycle is driven in the state illustrated in FIG. 9c , themovement roller 140 rotating with the hub 100 rotates in a state wherethe movement roller 140 is in close contact with the pad 151 b of theright fixing ring 150 b, and thus the movement roller 140 rotates in adirection in which the movement roller 140 is tightened with respect tothe screw rod 130. In this case, the movement roller 140 rotates alongwith the pad 151 b of the right fixing ring 150 b, in a direction inwhich the movement roller 140 is tightened with respect to the rod, andmoves inward, as illustrated in FIGS. 7c, 10c, and 11a . At this time,the hub 100 also moves inward along the support plate 110.

Therefore, the hub 100 is concentric with the hub shaft 5, asillustrated in FIGS. 9c and 10a . As a result, the normal driving modein which the bicycle does not swing during driving is maintained. Afterthe driving mode is switched to the normal driving mode, as describedabove, the wire W4 in a pulled state is released through the switchingmember 170, in such a manner that the pad 151 b of the right fixing ring150 b is separate from the movement roller 140.

The basic feature of a technical configuration of a horse-riding bicycleaccording to a second embodiment of the present invention is as follows.As illustrated in FIGS. 13 to 22, the horse-riding bicycle according tothe second embodiment of the present invention includes: a pair of hubs200 which are installed in each of the front and rear wheels 2 and 3 ofthe bicycle 1, the pair of hubs 200 including guide holes 201 having arectangular shape and a nut 202 which is connected to one sides of thehubs 200 and in which a female screw 202 a is formed; a pair of supportplates 210 which are movably assembled inside the guide hole 201 of thehub 200, support the hub shaft 5 connected to the fork 4 and include aconnection plate 211 which is connected to one sides of the supportplates 210 and in which a shaft hole 211 a is formed; guide plates 220which are respectively attached to inner upper and lower portions of thehub 200 and guide movement of the hub 200; a motor 230 which includes ashaft 231 which is inserted into the shaft hole 211 a and is fixed to aninner side of the connection plate 211; a screw rod 240 which isthread-joined to a female screw 202 a of the nut 202 in a state wherethe screw rod 240 is fixed to the shaft 231 of the motor 230; a battery250 which is installed in a frame 7 of the bicycle 1; a slip ring 260which is installed in the hub shaft 5 and allows the motor 230 to beelectrically connected to the battery 250; and a pair of operationmembers 270 which are installed in the handles 6 on both sides of thebicycle 1 and allow the motor 230 to be driven in the normal directionor the reverse direction.

In this case, the hubs 200 are formed to have a rectangular shape. Thehubs 200 are installed in both sides of the center portions of the frontwheel 2 and the rear wheel 3 of the bicycle 1. The guide holes 201having a rectangular shape are respectively formed in the pair of bothhubs 200. In addition, the nut 202 having the female screw 202 a formedtherein is connected to one sides of the pair of both hubs 200. In thiscase, a plurality of spacing rods (203) are connected to both the hubs200 and the guide plates 220 by fastening screws or the likes, asillustrated in FIG. 14.

The support plate 210 is formed to have a rectangular shape and ismovably assembled inside the guide holes 201 of both the hubs 200 whichare disposed in the front and rear wheels 2 and 3. The pair of bothsupport plates 210 rotatably support front and rear hub shafts 5 whichare connected to the front and rear forks 4. The connection plate 211having the shaft hole 211 a formed therein is connected to one sides ofthe pair of both support plates 210.

The guide plates 220 are respectively attached to the inner upper andlower portions of the hub 200. Both the guide plates 220 in the upperand lower portions guide the movement of the hub 200. In this case, boththe upper and lower guide plates 220 are attached to the hub 200 byscrewing, welding, or the like. A pair of both support plates 210 aredisposed in a portion between the upper guide plate 220 and the lowerguide plate 220.

According to the present invention, fixing pieces 221 in which screwholes 221 a are formed are attached to each of the guide plates (120) onboth sides of the guide hole 201, as illustrated in FIGS. 15 and 16.Furthermore, in a center portion between both the fixing pieces 221, amovement tube 222 is attached to the guide plate 220. Both ends of aguide rod 223 are fixed to screw holes 221 a of both the fixing pieces221 by fastening a screw 224, in a state where the guide rod 223 isinserted into the movement tube 222. In addition, support tubes 212 intowhich the guide rods 223 are inserted and which movably support theguide rods 223 are attached to upper and lower portions on one side ofthe support plate 210.

The motor 230 is disposed inside the connection plate 211 of the supportplate 210 and integrally fixed to the connection plate 211 by fasteninga plurality of screws. The shaft 231 of the motor 230 is inserted intothe shaft hole 211 a of the connection plate 211 and protrudes towardthe nut 202. The screw rod 240 is integrally fixed to the shaft 231 ofthe motor 230. In this case, the motor 230 causes the screw rod 240 tobe driven in the normal direction or the reverse direction.

In the motor 230, one end is integrally fixed to the shaft 231 of themotor 230. The screw rod 240 extends over a center portion of the nut202 provided in the hub 200. In this case, the screw rod 240 is screwedwith the female screw 202 a of the nut 202 and moves the hub 200. Inother words, the screw rod 240 rotates in the normal direction or thereverse direction and moves the hub 200 to the normal driving modeposition or the horse-riding driving mode position.

According to the present invention, a shaft groove 241 into which theshaft 231 of the motor 230 is inserted is formed in the screw rod 240,as illustrated in FIGS. 16 and 17. In addition, a headless bolt 242which fixes the shaft 231 of the motor 230, which is inserted into theshaft groove 241, is provided in the motor 230.

When a rotation force is applied to the screw rod 240 in the normaldirection or the reverse direction, the guide hole 201 of the hub 200smoothly moves along the support plate 210 toward the inner side or theouter side by tightening or releasing of the nut 202 which isthread-joined to the screw rod 240. As a result, the hub 200 canmaintain the concentric state or the eccentric state in relation to thehub shaft 5. In this case, the screw rod 240 maintains a fixed state inrelation to the support plate 210 and the nut 202 is assembled in astate where the nut 202 is fixed to the hub 200 and thread-joined to thescrew rod 240 and thus, when the screw rod 240 is rotated in the normaldirection or the reverse direction, the nut 202 moves in a directiondirected to the hub shaft 5 or an opposite direction by the screw rod240. As a result, the hub 200 moves along with the nut 202.

The battery 250 is installed in the frame 7 of the bicycle 1, asillustrated in FIG. 13. The battery 250 supplies electric power to themotor 230. In this case, the battery 250 is electrically connected tothe motor 230 and the operation member 270.

The slip ring 260 is installed in the hub shaft 5. The slip ring 260electrically connects the motor 230 and the battery 250. In this case,during driving of the bicycle 1, the slip ring 260 and support plate 210supply electric power from the battery 250 to the motor 230 in arotating state without tangling of wires.

According to the present invention, the slip ring 260 include first andsecond rotation rings 261 and 262 and first and second terminals 264 and265, as illustrated in FIGS. 17, 18, 20 a, and 20 b. The first andsecond rotation rings 261 and 262 are installed in an insulation ring 5a which is thread-joined to the hub shaft 5 in a state where the firstand second rotation rings 261 and 262 are separate from each other.Further, the first and second rotation rings 261 and 262 are connectedto the motor 230 through wires. The first and second terminals 264 and265 are embedded in a stator 263 so as to be connected to the first andsecond rotation rings 261 and 262 respectively. The first and secondterminals 264 and 265 are connected to the battery 250 through wires. Inthis case, a female thread is formed in an inner periphery of theinsulation ring 5 a and a male thread which is thread-assembled to thefemale thread of the insulation ring 5 a is formed in an outer peripheryof the hub shaft 5. The stator 263 is integrally fixed to the fork 4 ofthe bicycle 1. In addition, a hole 210 a through which wires are takenout is formed in the support plate 210, as illustrated in FIG. 18.

According to the present invention, the first and second rotation rings261 and 262 are constituted of anode rings 261 a and 262 a and cathoderings 261 b and 262 b which are formed to have a semicircular shape andrespectively connected to the motor 230 through wires, as illustrated inFIGS. 20a, 21b, 21a, and 21b . The first and second terminals 264 and265 include anode terminals 264 a and 265 a and cathode terminals 264 band 265 b which correspond to the anode rings 261 a and 262 a and thecathode rings 261 b and 262 b. In this case, when the motor 230 isdriven in the normal direction, electric power is only supplied to theanode terminal 264 a and the cathode terminal 265 b which receive load.When the motor 230 is operated in the reverse direction, electric poweris only supplied to the cathode terminal 264 b and the anode terminal265 a which receive load.

It should be understood that the first and second rotation rings 261 and262 may not be separate from each other so as to be formed to have asemicircular shape, as described above, and formed to have a circularshape and, further, the first rotation ring 261 may constitute an anodering (or a cathode ring) and the second rotation ring 262 may constitutea cathode ring (or an anode ring).

The operation members 270 are installed in the handles 6 on both sidesof the bicycle 1. A pair of both operation members 270 performs aswitching operation for driving, in the normal direction or the reversedirection, the motors 230 which are respectively installed in the frontand rear wheels 2 and 3. In this case, the operation member 270installed in one side of the handle 6 drives, in the normal direction orthe reverse direction, the motor 230 disposed in the front wheel 2 andthe operation member 270 installed on the other side of the handle 6drives, in the normal direction or the reverse direction, the motor 230disposed in the rear wheel 3.

According to the present invention, a generator 280 which charges thebattery 250 is installed in the frame 7 of the bicycle 1, as illustratedin FIG. 13. In this case, a rotor 281 which comes into contact with thewheel of the bicycle 1 is provided in the generator 280 and a charger isprovided in the battery 250. The generator 280 and the charger of thebattery 250 are electrically connected.

First and second limit switches 291 and 292 are respectively installedin both sides of the support plate 210, as illustrated in FIGS. 16, 19a, and 19 b.

The details of the whole operational relationship of the horse-ridingbicycle according to the second embodiment of the present inventionconfigured as described above will be explained below with reference tothe appended drawings.

First, FIG. 19a illustrates the normal driving mode state in which thehub 200 and the hub shaft 5 are concentrically disposed. In this state,the hub 200 maintains a concentric state in relation to the hub shaft 5.Furthermore, when the bicycle 1 is driven in this state, the motor 230which rotates with the hub 200 is not driven. As a result, the hub 200does not swing and rotates in a state where the hub 200 maintains thenormal driving mode in concentric with the hub shaft 5.

Next, when a user switches a mode of the switching member 270 to thehorse-riding driving mode in the normal driving mode so as to switch thedriving mode to the horse-riding driving mode, the shaft 231 of themotor 230 is driven in the reverse direction in which the nut 202 movesoutward. In this case, the nut 202 moves outward, as illustrated in FIG.19b . At this time, the hub 200 also moves outward along with thesupport plate 210.

Therefore, the hub 200 is eccentric with respect to the hub shaft 5, asillustrated in FIG. 19b . As a result, the horse-riding driving mode inwhich the bicycle swing during driving is maintained. After the drivingmode is completely switched to the horse-riding driving mode, asdescribed above, a terminal 292 a of the second limit switch 292 comesinto contact with the hub 200 and driving of the motor 230 is stopped.In this case, during driving, a user can appropriately adjust a movement(eccentric) distance of the hub 200 through the switching member 270. Inother words, the motor 230 can be driven by the operation member 270until the hub 200 moves completely outward. When driving of the motor230 is stopped by the operation member 270 before the hub 200 movescompletely outward, the movement of the nut 202 is stopped, and thus thehub 200 is prevented from moving further outward. As a result, themovement distance of the hub 200 is adjusted during the horse-ridingdriving mode.

When a user switches the mode of the switching member 270 to the normaldriving mode during the horse-riding driving mode so as to switch thedriving mode to the normal driving mode, the shaft 231 of the motor 230is driven in the normal direction in which the nut 202 moves inward. Inthis case, the nut 202 moves inward, as illustrated in FIG. 19a . Atthis time, the hub 200 also moves inward along with the support plate210.

Therefore, the hub 200 is concentric with the hub shaft 5, asillustrated in FIG. 19a . As a result, the normal driving mode in whichthe bicycle does not swing during driving is maintained. After thedriving mode is completely switched to the normal driving mode, asdescribed above, a terminal 291 a of the first limit switch 291 comesinto contact with the hub 200 and driving of the motor 230 is stopped.

Therefore, according to the present invention, both normal driving andhorse-riding driving can be performed by moving the hub 100 or 200 to aposition concentric or eccentric with respect to the hub shaft 5. As aresult, a swinging movement similar to horse riding is achieved incycling, and thus there is an advantage in that a horse-riding effectwhich is exciting and can provide a total-body workout can be obtainedfrom simple cycling.

In addition, the present invention has an advantage in that a user cansimply switch the driving mode between the normal driving mode and thehorse-riding driving mode using the switching member 170 or theoperation member 270.

Furthermore, the present invention has an advantage in that a reductionin the cost is achieved and a switching operation between the normaldriving mode and the horse-riding driving mode is smoothly performedbecause the structure of the horse-riding driving mode in which the hub100 or 200 is moved is simple.

Additionally, in the present invention, the normal driving mode or thehorse-riding driving mode can be selectively applied to the front wheel2 and the rear wheel 3. Thus, only the front wheel 2 can be driven inthe horse-riding driving mode while the rear wheel 3 is driven in thenormal driving mode. In contrast, only the rear wheel 3 can be driven inthe horse-riding driving mode while the front wheel 2 is driven in thenormal driving mode. Furthermore, both the front wheel 2 and the rearwheel 3 are driven in the horse-riding driving mode. As a result, thepresent invention has an advantage in that horse-riding effectsdifferent from each other can be obtained.

While the embodiments of the present invention have been described withreference to the specific embodiments, it will be apparent to thoseskilled in the art that various changes and modifications may be madewithout departing from the spirit and scope of the invention as definedin the following claims.

DESCRIPTION OF REFERENCE NUMERALS 100: hub 101: guide hole 102: rollerhole 103: first connection plate 103a: shaft hole 104: second connectionplate 104a: shaft hole 110: support plate 111: connection plate 120:guide plate 130: screw rod 140: movement roller 150a: left fixing ring151a: pad 150b: right fixing ring 151b: pad 160a: left operation member160b: right operation member 170: switching member 200: hub 201: guidehole 202: nut 202a: female screw 210: support plate 211: connectionplate 211a: shaft hole 220: guide plate 230: motor 231: shaft 240: screwrod 250: battery 260: slip ring 270: operation member

What is claimed is:
 1. A horse-riding bicycle comprising: a pair of hubswhich are installed in each of front and rear wheels of a bicycle, thepair of hubs including guide holes and roller holes and first and secondconnection plates which are connected to both sides of the roller holeand in which shaft holes are formed; a pair of support plates which aremovably assembled inside the guide hole of the hub and of which onesides are connected by a connection plate so as to support a hub shaftconnected to a fork; guide plates which are respectively attached toinner upper and lower portions of the hub and guide movement of the hub;a screw rod which is fixed to the connection plate of the support plateand disposed in center portions of the shaft holes; a movement rollerwhich is installed in the shaft holes such that both ends are rotatablein a state where the movement roller is thread-joined to the screw rodand an outer surface protrudes outside through the roller hole and movesthe hub to a position of a normal driving mode or a horse-riding drivingmode by rotating in a normal direction or a reverse direction; left andright fixing rings which are disposed in an outer side of the hub andinclude pads of which inner surfaces are come into contact with themovement roller; left and right operation members which are installed inthe fork and cause the left and right fixing rings to come into closecontact with the movement roller selectively; and a pair of switchingmembers which are installed in handles on both sides of the bicycle andrespectively pull or release the left and right operation membersthrough wires.
 2. The bicycle of claim 1, wherein two fixing pieces inwhich screw holes are formed are attached to each of guide platesdisposed on both sides of the guide hole, a movement tube is attached tothe guide plate in a center portion between the fixing pieces on bothsides, both ends of a guide rod is fixed to the screw holes of thefixing pieces on both sides by fastening screws in a state where theguide rod is inserted into the movement tube, and support tubes intowhich the guide rods are inserted and which movably support the guiderods are attached to upper and lower portions on one side of the supportplate.
 3. The bicycle of claim 1, wherein a pair of fixing pieces inwhich rivet holes are formed are attached to the connection plate, afixing portion which includes a rivet hole and is fixed by a rivet in astate where the fixing portion is inserted between the pair of fixingpieces is formed in one end of the screw rod, a hollow portion is formedinside the screw rod, a female screw to which the screw rod isthread-joined is formed in a center portion in an inner portion of themovement roller, insertion holes are respectively formed on both sidesof the movement roller, rotation portions in which screw holes passthrough center portions of inner portions are respectively inserted intothe insertion holes and fixed by fastening a plurality of bolts andnuts, and shafts which are respectively inserted into the shaft holesare formed in the rotation portions.
 4. The bicycle of claim 1, whereinoperation rods are fixed to both upper portions and lower portions ofthe left and right fixing rings, the left and right operation membersinclude a pair of fixing plates which are fixed to the fork and includesupport tubes to which the operation rods are respectively inserted, theoperation rods are inserted into the support tubes in a state where theoperation rods receive elasticity from springs supported by snap ringssuch that the left and right fixing rings elastically come into contactwith the support tubes, cam fixing pieces are attached to upper andlower portions of the fixing plates, cam fixing pieces are attached toupper and lower portions of the fixing plates, the operation cams whichpush the operation rods in such a manner that the operation cams causethe left and right fixing rings to come into close contact with themovement roller selectively are rotatably respectively inserted in camfixing pieces, and wires are respectively connected to pivoting pieceswhich are provided in the cam fixing pieces.
 5. A horse-riding bicyclecomprising: a pair of hubs which are installed in each of front and rearwheels of a bicycle, the pair of hubs including guide holes having arectangular shape and a nut which is connected to one sides of the hubsand in which a female screw is formed; a pair of support plates whichare movably assembled inside the guide hole of the hub, support a hubshaft connected to a fork and include a connection plate which isconnected to one sides of the support plates and in which a shaft holeis formed; guide plates which are respectively attached to inner upperand lower portions of the hub and guide movement of the hub; a motorwhich includes a shaft which is inserted into the shaft hole and isfixed to an inner side of the connection plate; a screw rod which isthread-joined to a female screw of the nut in a state where the screwrod is fixed to the shaft of the motor; a battery which is installed ina frame of the bicycle; a slip ring which is installed in the hub shaftand allows the motor to be electrically connected to the battery; and apair of operation members which are installed in handles on both sidesof the bicycle and allow the motor to be driven in a normal direction ora reverse direction.
 6. The horse-riding bicycle of claim 5, wherein theslip ring comprises: first and second rotation rings which are installedin an insulation ring which is thread-joined to the hub shaft in a statewhere the first and second rotation rings are separate from each other,and are connected to the motor through wires; and first and secondterminals which are embedded in a stator so as to be connected to thefirst and second rotation rings respectively and are connected to thebattery, the first and second rotation rings are constituted of anoderings and cathode rings which are formed to have a semicircular shapeand are connected to the motor through wires, and the first and secondterminals are constituted of anode terminals and cathode terminals whichcorrespond to the anode rings and the cathode rings and are connected tothe battery through wires.